#include <bits/stdc++.h>
using namespace std;
int main() {
char a, b = 'z', c = 'a', d = 'Z', e = 'A';
while(cin >> a){
char f = a - 1, g = a - 35;
if(a < b && a >= c){
cout << char(a + 1);
}
else if(a < d && a >= e){
cout << char(a + 1);
}
else if(a == 'z' || a == 'Z'){
cout << char(a - 25);
}
}
return 0;
}
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